Monographs Details: Macrolobium colombianum var. metaense Cowan
Authority: Cowan, Richard S. 1953. A taxonomic revision of the genus Macrolobium (Leguminosae-Caesalpinioideae). Mem. New York Bot. Gard. 8 (1): 257-342.
Family:Caesalpiniaceae
Description:Latin Diagnosis - Arbuscula ad 2.5 m. alta vel arbor 5-6 m. alta, ramulis pilosis. Stipulae 15-25 mm. longae, 4-8 mm. latae, foliaceae, falcatae, ellipticae, acuminatae. Folia obovata vel oblanceolata, 7-10-jugata, paribus 6-15 mm. separatis. Petioli 3-7 mm. longi, pilosi; rachis 7-12 cm. longa, supra uncinato-puberula, infra alis glabris, axe piloso. Foliola (13-)20-55 mm. longa, (4-)8-20 mm. lata, oblonga, costa puberula supra, infra plus mihusve pilosula. Inflorescentiae 2,5-5.5 cm. longae, terminales, sessiles; bracteis 2 mm. longis, 1 mm. latis, intus glabris, extus adbasim puberulis; pedicelli 2.5-5mm. longi, puberuli; bracteolae 6-9mm. longae, 3-4 mm. latae, ovales ad obovatae, extus plus minusve puberulae, intus glabrae. Hypanthium 5-8 mm. longum, stipite ca. 1 mm. longo, puberulum. Sepala (6-)8-12 mm. longa, (2-)4-6 mm. lata, ad apicem sparse ciliolata, oblonga ad elliptica vel obovata. Petalus 20-25 mm. longus, 8.5-13 mm. latus, sessilis vel unguicilo 2-2.5 mm. longo. Filamenta 30-35 mm. longa, basim versus villosula, antherae 2.5-3 mm. longae, 1.5-2 mm. latae. Stigma capitellatum. Stylus 20-27.5 mm. longus, basim versus pilosulus. Ovarium 3 mm. longum, 1-1.5 mm. la turn, oblongum, lateraliter puberulum vel pilosulum, gynophoro 4 mm. longo, pilosulo. Fructus elongato- oblongus, marginibus puberulis, carpophoro 10 mm. longo, pilosulo.

Distribution and Ecology - Additional Specimens: COLOMBIA: Meta: Los Llanos, Villavicencio toward El Parrao, Nov. 1938, Cuatrecasas 4607 (US); Quebrada Negra, near Villavicencio, Jan. 1939, Haught 2555 (F, NY, US); Acacias, Aug. 1946, Uribe 1359 (US).

Discussion:

Type Collection: R. Jaramillo, D. Mesa, et al. 412, "Acacias, Intendencia del Meta," Colombia, Aug. 1946 (HOLOTYPE US).